TY - JOUR
T1 - Foliar application of methyl jasmonate induced physio-hormonal changes in Pisum sativum under diverse temperature regimes
AU - Shahzad, Raheem
AU - Waqas, Muhammad
AU - Khan, Abdul Latif
AU - Hamayun, Muhammad
AU - Kang, Sang Mo
AU - Lee, In Jung
N1 - Publisher Copyright:
© 2015 Elsevier Masson SAS.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - Global climate change brings with it unwarranted shifts in both abiotic (heat stress, cold stress, wind, precipitation) and biotic (pathogens, pests) environmental factors, thus posing a threat to agricultural productivity across the world. In plants, lodging due to storms or herbivory causes wounding stress and consequently enhances endogenous jasmonates. In response, the plant growth is arrested as plant defense is prioritized. We pre-treated pea plants with elevated methyl jasmonate (MeJA) levels i.e. 50 μM, 100 μM and 200 μM under controlled growth chamber conditions. The pre-treated plants were then kept at 40 °C (heat stress-HS), 4 °C (cold stress-CS) and 20 °C (optimum/control temperature-OT) for 72 h. The effect of such treatments on plant growth attributes, photosynthesis, stomatal conductance, cell death rate, and regulation of endogenous hormones were observed. Elevated MeJA application hindered plant growth attributes under HS, CS and OT conditions. Moreover, elevated MeJA levels lowered the rate of photosynthesis and stomatal conductance, induced stomatal closure, caused higher cells mortality in leaves under HS, CS, and OT conditions. Endogenous ABA contents significantly declined in all MeJA treatments under HS and OT, but increased under CS conditions. Exogenous MeJA enhanced endogenous jasmonic acid contents of pea plants, but altered endogenous salicylic acid contents under varying temperatures. Current study shows that higher concentrations of exogenous MeJA strengthen plant defense mechanism by hindering plant growth under stress conditions.
AB - Global climate change brings with it unwarranted shifts in both abiotic (heat stress, cold stress, wind, precipitation) and biotic (pathogens, pests) environmental factors, thus posing a threat to agricultural productivity across the world. In plants, lodging due to storms or herbivory causes wounding stress and consequently enhances endogenous jasmonates. In response, the plant growth is arrested as plant defense is prioritized. We pre-treated pea plants with elevated methyl jasmonate (MeJA) levels i.e. 50 μM, 100 μM and 200 μM under controlled growth chamber conditions. The pre-treated plants were then kept at 40 °C (heat stress-HS), 4 °C (cold stress-CS) and 20 °C (optimum/control temperature-OT) for 72 h. The effect of such treatments on plant growth attributes, photosynthesis, stomatal conductance, cell death rate, and regulation of endogenous hormones were observed. Elevated MeJA application hindered plant growth attributes under HS, CS and OT conditions. Moreover, elevated MeJA levels lowered the rate of photosynthesis and stomatal conductance, induced stomatal closure, caused higher cells mortality in leaves under HS, CS, and OT conditions. Endogenous ABA contents significantly declined in all MeJA treatments under HS and OT, but increased under CS conditions. Exogenous MeJA enhanced endogenous jasmonic acid contents of pea plants, but altered endogenous salicylic acid contents under varying temperatures. Current study shows that higher concentrations of exogenous MeJA strengthen plant defense mechanism by hindering plant growth under stress conditions.
KW - Abiotic factors
KW - Biotic factors
KW - Global climate change
KW - Growth and defense tradeoff
KW - Hormonal regulation
KW - MeJA
KW - Plant breeding
KW - Stress
UR - http://www.scopus.com/inward/record.url?scp=84941614320&partnerID=8YFLogxK
U2 - 10.1016/j.plaphy.2015.08.020
DO - 10.1016/j.plaphy.2015.08.020
M3 - Article
C2 - 26379199
AN - SCOPUS:84941614320
SN - 0981-9428
VL - 96
SP - 406
EP - 416
JO - Plant Physiology and Biochemistry
JF - Plant Physiology and Biochemistry
ER -